72420700 has 36 divisors (see below), whose sum is σ = 171442152. Its totient is φ = 26334400.

The previous prime is 72420679. The next prime is 72420701. The reversal of 72420700 is 702427.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72420701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31819 + ... + 34018.

It is an arithmetic number, because the mean of its divisors is an integer number (4762282).

Almost surely, 2^72420700 is an apocalyptic number.

It is an amenable number.

72420700 is an abundant number, since it is smaller than the sum of its proper divisors (99021452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72420700 is a wasteful number, since it uses less digits than its factorization.

72420700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65862 (or 65855 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 72420700 is about 8510.0352525709. The cubic root of 72420700 is about 416.8254612524.

The spelling of 72420700 in words is "seventy-two million, four hundred twenty thousand, seven hundred".